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Commit 95c97b59 authored by Corey Minyard's avatar Corey Minyard
Browse files

ipmi: Check the BT interrupt enable periodically 



On a reset, the BMC may reset the BT enable in the processor
registers (different than the global enables in the BMC).  Check
it periodically and fix it if necessary.

Signed-off-by: default avatarCorey Minyard <cminyard@mvista.com>
Tested-by: default avatarTony Rex <tony.rex@ericsson.com>
Tested-by: default avatarMagnus Johansson E <magnus.e.johansson@ericsson.com>
parent a8df150c

drivers/char/ipmi/ipmi_si_intf.c

+25 −2
Original line number Diff line number Diff line
@@ -536,7 +536,8 @@ static void handle_flags(struct smi_info *smi_info) 
#define GLOBAL_ENABLES_MASK (IPMI_BMC_EVT_MSG_BUFF | IPMI_BMC_RCV_MSG_INTR | \

			     IPMI_BMC_EVT_MSG_INTR)



static u8 current_global_enables(struct smi_info *smi_info, u8 base)

static u8 current_global_enables(struct smi_info *smi_info, u8 base,

				 bool *irq_on)

{

	u8 enables = 0;
@@ -557,9 +558,27 @@ static u8 current_global_enables(struct smi_info *smi_info, u8 base) 
	else

		enables &= ~IPMI_BMC_EVT_MSG_INTR;



	*irq_on = enables & (IPMI_BMC_EVT_MSG_INTR | IPMI_BMC_RCV_MSG_INTR);



	return enables;

}



static void check_bt_irq(struct smi_info *smi_info, bool irq_on)

{

	u8 irqstate = smi_info->io.inputb(&smi_info->io, IPMI_BT_INTMASK_REG);



	irqstate &= IPMI_BT_INTMASK_ENABLE_IRQ_BIT;



	if ((bool)irqstate == irq_on)

		return;



	if (irq_on)

		smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG,

				     IPMI_BT_INTMASK_ENABLE_IRQ_BIT);

	else

		smi_info->io.outputb(&smi_info->io, IPMI_BT_INTMASK_REG, 0);

}



static void handle_transaction_done(struct smi_info *smi_info)

{

	struct ipmi_smi_msg *msg;
@@ -708,6 +727,7 @@ static void handle_transaction_done(struct smi_info *smi_info) 
	{

		unsigned char msg[4];

		u8 enables;

		bool irq_on;



		/* We got the flags from the SMI, now handle them. */

		smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
@@ -719,7 +739,10 @@ static void handle_transaction_done(struct smi_info *smi_info) 
			smi_info->si_state = SI_NORMAL;

			break;

		}

		enables = current_global_enables(smi_info, 0);

		enables = current_global_enables(smi_info, 0, &irq_on);

		if (smi_info->si_type == SI_BT)

			/* BT has its own interrupt enable bit. */

			check_bt_irq(smi_info, irq_on);

		if (enables != (msg[3] & GLOBAL_ENABLES_MASK)) {

			/* Enables are not correct, fix them. */

			msg[0] = (IPMI_NETFN_APP_REQUEST << 2);